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A-9
Glossary
monitoring
Process of receiving, displaying, and logging system events.
multilevel array
See dual-level array.
O
OCE
Online Capacity Expansion. The incremental expansion of an array
that requires no downtime and retains all the attributes of the
original array. See also reconfiguration, RAID 0, RAID 5.
offline array
Array that can no longer be accessed.
offset
Distance from the beginning of a disk to the start of a segment.
optimal
An array in its normal operational state in which all of the
components are present and operating correctly is optimal. For
redundant arrays, the entire array is protected.
P
parity
Form of error-checking redundancy used to protect the data in a
RAID 5.
partition
See segment.
phantom object
Object that represents a component that cannot be configured by
the controller management software; for example, a missing drive.
physical drive
Single drive. See also logical device.
UG.book Page 9 Saturday, October 26, 2002 12:08 PM